普通V带传动的设计计算.课件

带传动普通V带传动的设计计算普通V带传动的设计计算一、失效形式和设计准则失效形式:S设计准则:不打滑F<Fmax不断裂P^nax1000kW普通V带传动的设计计算特定条件1）载荷平稳2)=1包角cz(

=180°—d2,i—

1)3）特定带长〜4）化学纤维绳芯结构F1000kW见下表7_4表74单根普通V带的基本额定功率P0(kW)带型小带轮基准直径rfj/mm小带轮转速(r/min)400730800980120014602800500,060.090.100.120.140.160.267630.080.130.150.180.220.250.41710.090・170.200.230.270310.50800・140・200.220.260300360.56750.270.420.450.520.600.681.00900390.630.680.790.931.071.64A1000.470・770.830.97L141322.051120.560.931.001.181391.622.511250.671.111.19L401.661.932.98表74单根普通V带的基本额定功率P0(kW)带型小带轮/基准直径^/mm小带轮转速〃,/(r/min)4007308009801200146028001250.84134L441.671.932.202.961401.051.691.822.132.472.833.85B1601322.162322.723.173.644.89180L592.612.813303.854.415.762001.853.053303.864.505.156.432002.413.804.074.665.295.865.012242.994.785.125.896.717.476.08C2503.625.826.237.188.219.066.562804326.997.528.658.8110.746.133155.148348.9210*2311.5312.484.164007.061L5212.101X6715.0415.51—普通V带传动的设计计算2.单根普通V带的许用功率［PJ实际条件与特定条件不同时，需对，进行修正。[P^{P.+^P.)KaKL••功率増量见下表7-5表7-5单根普通V带额定功率增量APe(kW)@带型小带轮转速"/(r/min)1.001.01L021.041-051.08L091.121.131.181.191.24L251.341351311.521.99>24000.000*000.000.000.000*000-000*000-010.017300.000.000.000.000.000.00O10.010.010.028000.000.000.000.000.010.010.010.010.020.02Z9800.000.000.000.010.010.010.010.010.020.021200(L000.000.010.010.010.010.020<020.020.0314600.000.000.010.010.011

0.020.020.020.020.0328000.000.010.020.020,030.030.030・040.040.044000.000.01(hOl0.020.020.030.030.040.04OeO57300.000.010.020.030.040.050.060<070.080.098000.000.010.020.030.040.050.060.080.090・10A9800.000.010.030.040.050.060.070・080.100.1112000.000.020.030.050.070.080.100.110.130.1514600.000.020.040.060.080.090.110J30.150.1728000.000.040.080.110.150.190.230.260300.34表7-5单根普通V带额定功率增量AP。(kW)@带型小带轮转速(r/min)传动比Z1.001.011.021.041.051.08L091.121.131.181.191.241.251341.351.511.521.99>24000.000.010.030.040.060.070.080.100.110.137300.000.020.050>070.100.120.150.170.200-228000.000#030.060.080.110.140.170.200.230.25B9800.000*030.(，7(K100.130.170.200*230.2603012000.000.040.080.130.170.210.250300.340.3814600.000*050.100J50.200.250310360.4004628000.000J00-200.290390.490390・690.790.894000.000.040.080.120.160.200.230.270310357300.000.070.140.210.270340.410.480.550.628000.000*080J60<230310390.470*550<630・71C9800.000.090J90.270370.470.560.650.740.8312000.000.120.240350.470.590.700.820.941.0614600.000.140.280.420.580.710.850.991.14L2728000.000.270.550.821.101371.641.922.192.47普通#传动的设计计算[PQ]=(P^^)KaKL包角修正系数al

=180°表7-6包角修正系数/la«1180°170°160°150°140°130°120°Ka1.000.980.950.920.890.860.82久、…带长修正系数见下表7-2没计计算甬lbV带与V带轮题表7-2普通V带的长度系列和带长修正系数基准长度ld/mm带长修正系数久，YZABCDE柵0.960.874501•⑽0.895001.020.915600.946300,960.817100.990.83800L000.859001.030.870.8210001.060.890.8411201.080.910.861250L110.930.88V带与V带轮基准长度Ld/mm带长修正系数YZABCDE14001.140・960.9016001.160.990.920.831800L18L010.950.8620001.030.980.8822401.061.000.912500L091.030.9328001.111.050,950.8331501.131.070.970.863550L171.090.990・894000L191.13L020・9145001.15L040.930.9050001.181.070.960.92普通V带传动的设计计算二、设计步骤和方法案例分析已知条件:两班制，载荷较平稳空载起动；速度允差±5%•要求：设计V带传动1.普通V带传动的设计计算确定计算功率PC=K\P=\.2X

3.7=4.4kW栽荷性质P=3.7kW工作机载荷变动很小液体搅拌机、通风机和鼓风机（＜7.5kW）、离心式水泵和压缩机、轻负荷输送机载荷变动小带式输送机（不均匀负荷）、通风机和鼓风机（＞7.5kW）、旋转式水泵和压缩机《非离心式）、发电机、金属切削机床、印刷机、旋转筛、锯木机和木工机械载荷变动较大载荷变动很大制砖机、斗式提升机、往复式水泵和压缩机、起重机、磨粉机、冲剪机床、橡胶机械、振动筛、纺织机械、重负荷机破碎机（旋转式、鄂式）、磨碎机电动机（交流启动、三角启动、直流并励）、四缸以上内燃利电动机《联机交流启动、直流复励或串励）、四缸以下内燃机嘹天工作小时数广<1010^16>16<1010^16>16cE5812.52031.55080125200631016254063100160250/?/kW8005004003152502001000.8L2523J51L62,54Pc=4.4kWn1=960r/min普通V带传动的设计计算^2.确定V带型号500040003150250020001600125023普通V带传动的设计计算3.确定带轮基准直径A、d2①小带轮直径似min型号YZABC最小直径205075125200②^=112〜140mm(选型I)③符合标准系列（mm）直径小，带拉力大,根数多，弯曲应力大，寿命短2022.4252831.535,54045505663677175808590100106112118(125(13214015016017018020021222423625026528030031535537540042545050053056060063067071075080090010⑽等。S）大带轮直径普通V带传动的设计计算Hd、———d人=125x2.8=35(mm~n2d2=355mm标准系列(mm>2022.4252831.535.5404550566367717580859010010611211812513214015016()1701802002122242362502652803003is|3551375400425450500530560600630670710750800900100()等。V5m/s<v<25m/s3带速低，拉力大，根数多，压轴力大带速高，离心力大，循环快，寿命短4.验算带速v叫"1欠1广普通V带传动的设计计算带速卜咖鵬Ttd.n.v=--60x100060x10005.确定带轮中心距a和带的基准长度么带长，循环慢，寿命长，但颤动、尺寸大a0

=700mm普通V带传动的设计计算初定带长2=2173mm24x700实际中心距2=733mm靠系列表7-2Ld=2240mm=2x7OQ+£(125±355)+(355-12^普通V带传动的设计计算.^o+^=7OO+2240-2173°2,_.«+J2),(d2[do一Z<7()+-+:24a0普通V带传动的设计计算a

«733mm中心距调整量min

=a-0・015Ld

=(733-0.015x2240)mm=699.4mm=a+0胤d=(733+0・03x2240)mm=800.2mm6.验算小带轮上的包角％aj>120°，aa。

d，_di=180-----x57.3°a355—175-180°-——x573°=162°733包角小，摩擦力小减小传动比若％＜120增大中心距加张紧轮d(i-\}6Ti=180°-lVvx573°ai<7f=2~44.44=2.91普通V带传动的设计计算▲7.确定V带的根数z,>A=一一、[PQ](h+APH(1.4+0.11)x0.95x1.06Pc=4.4kW表基本额定功率P（）=14kW表7-5

功率增最APp=0.11kW表7-6包角修正系数X„=0.95表7-2带长修正系^Kj=1.06Pc=4.4kWz=3v=6.28m/s普通V带传动的设计计算8.确定V带的初拉力Fo不打滑时的最小初拉力-l)+^v2zvKa500x4.44z2.5o1oo2=-(--1)+0.1x6.28"3x6,280.95=196N7^=0-95分一带线密度飽^=0.1kg/m新带易松弛，非自动张紧时，放大1.5倍初拉力的检验方法ik*9.计算压轴力FP普通V带传动的设计计算⑽。今2x3x196議｝剛普通V带传动的设计计算10.V带轮的设计带轮线速度V=6.28m/s,小于25m/s,采用HT150小带轮A=125mm电机轴径4=38mmd{>3ds采用腹板式结构普通V带传动的设计计算大带轮＜/2=355mmd>300mm釆用轮辐式P-i.f调节螺钉固定螺栓导轨滑道式张紧4XI2普通V带传动的设计计算设计结果A型V带，3根，Ld=2240mmF小带$^J|=125mm,HT150,5腹板式结构大带^2=355mm,HT150,辐式结构i

=2.8中心距a=733mm初拉力FF196N,滑道式张紧压轴力FP=1161NP=3>7kWJ1MI=960r/min400031502500200()Pc=4.4kwM!=960rpm50.8L2523J51L62,54812.52031.55080125200631()16254063100160250普通V带选型图普通V带传动的设计计算O0500O015054322/:./kW2173普通V带传动的设计计算基准长度Ld/mm带长修正系数KiYZABCDE14001.140・960.9016001.160.990.920.831800L18L010.950.8620001.030.980.88[22401.061.000.912500L091.030.9328001.111.050,950.8331501.131.070.970.863550L171.090.990・894000L191.13L020・9145001.15L040.930.9050001.181.070.960.92表74单根普通V带的基本额定功率P0(kW)带型小带轮基准直径d{/mm小带轮转速(r/min)400730800980120014602800Z50637180A型弗Ji=12«!=965mmOr/mii0.100.150.2010.220.120.180.230.260.140.220.270300.160.250.310.360.260.410.500.56A75901001121250.270390.470.560.670.420.630.770.93Lil0.450.680.831.00L190.520.790.971JS1400.600.93L14L39L660.681.071.321.621.931.001.642.052.512.98表7-5单根普通V带额定功率增量(kW)带型小带轮转速(r/min)1.001.01L021.041-051.08L091.121.131.181.191.24L251.341351311.521.99>24000.000*000.000.000.000*000-000*000-010e017300.000.000.000.000.000.00O10.010.010.028000.000.000.000.000.010.010.010.010.020.02Z9800.000.00nnnnmnm0.010.010.010.020.021200(L000.00A型带0.010.020<020.020.0314600.000.00